The same would have been true of the Soviet Union in the original movie. If you bought into the original premise you should have no trouble with this one. Movies aren't real, but gullible people are. The original movie was entertaining, but fantasy. It was no more realistic than the new movie.

Judging by the few videos out there I think the premise is they nuke the poo out of us and it just leaves the middle, but I could be wrong.